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Keeper of Progenitus

Creature — Elf Druid

Whenever a player taps a Mountain, Forest, or Plains for mana, that player adds one mana of any type that land produced.

CMC
4
Mana cost
{3}{G}
Color identity
G
Rarity
rare
Set
Shards of Alara
Price
$1.42
EDHREC rank
#13721
Buy on TCGplayer
Keeper of Progenitus card art
Keeper of Progenitus doubles the mana from basic Forests, Plains, and Mountains for all players — a massive on-board effect that accelerates every green-white-red deck at the table, not just yours. The symmetry is the cost, and it's real: you need to be doing something more broken with that mana than your opponents, which is exactly why it slots cleanly alongside Magus of the Candelabra or under Yurlok of Scorch Thrash, where flooding everyone with mana is the point.

Best Commanders

Commanders with the highest synergy

01
Yurlok of Scorch Thrash

Yurlok of Scorch Thrash

22.4% of decks · synergy 0.21

Yurlok of Scorch Thrash converts unspent mana into damage, so the extra mana Keeper of Progenitus dumps into every player's pool doesn't help opponents — it burns them. The inclusion rate of 22% in Yurlok decks reflects exactly how central this interaction is to the archetype.

Format Analysis

Where it lives, where it can’t

FormatVerdict
commander legal
legacy legal
modern legal
pioneer not legal
standard not legal
vintage legal
pauper not legal
oathbreaker legal

Commander is where Keeper of Progenitus actually gets played, and the reason is simple: four-player tables mean three opponents benefiting from the doubling effect, which keeps it out of competitive lists but makes it a build-around in dedicated mana-chaos or group-hug shells. In Legacy and Vintage it's legal but irrelevant — five mana for a symmetrical effect doesn't fit any serious shell when faster, asymmetrical options exist. Modern follows the same logic: legal on paper, never played, outclassed by cheaper ramp that doesn't hand opponents double mana. Oathbreaker is the one non-Commander format where it could theoretically appear in a Gruul or Naya mana-storm build, though the card pool is narrow enough that it rarely shows up there either.

Key Combos

Combo lines featuring this card

1,065 decks
Magus of the CandelabraStaff of DominationKeeper of Progenitus

Magus of the CandelabraStaff of DominationKeeper of Progenitus

Infinite card draw; Infinite draw triggers; Infinite lifegain; Infinite lifegain triggers; Infinite mana creatures you control can produce; Infinite mana lands you control can produce; Infinite untap of creatures you control; Infinite untap of lands you control

View on Commander Spellbook ↗
3 decks
Springheart NantukoOverlord of the HauntwoodsSpelunkingKeeper of Progenitus

Springheart NantukoOverlord of the HauntwoodsSpelunkingKeeper of Progenitus

Infinite ETB; Infinite creature tokens; Infinite landfall triggers; Infinite tapped Mountain tokens; Infinite tapped Island tokens; Infinite tapped Forest tokens; Infinite tapped copies of a specific land; Infinite tapped Plains tokens; Infinite tapped Swamp tokens; Infinite card draw; Infinite draw triggers

View on Commander Spellbook ↗

Price Context

Current price

$1.42 cheap tier

At $1.42, Keeper of Progenitus sits firmly in the bulk-rare tier — cheap enough to throw into any Yurlok or mana-chaos build without a second thought. It's a narrow enough card that the price is unlikely to move unless a new commander pushes the archetype into higher demand.

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Sources

Mentioned

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Updated . Data from Scryfall, EDHREC, and Commander Spellbook.